Thermal cut-out.



-30 capacity `u 36 contact with the caps.

45 of -very small elect '$5 projected by the spring UNITED STATES PATENT -oFFIoE BRYSON l). HORTON, OF DETROIT, MICHIGAN, ASS

OF DETROIT, M

THERMAL GUT-OUT.

To dllivhom 'it may concern: b

Be-it known-that I, Bm'soN D. citizen of-.the United S troit, county'of Wayne, State of Michigam: have inventeda certain new and usefulImprov ent in Thermal Cut-Outa'and declare this 'fiihwing to be a full, clear, andexact de-. scription of the same, such as Willjenable' -others'skilled in theart .tol which it pertains 1o 'to'make' and use thesam'e', reference bein had to the accompanying'drawings, whic "form a part of this 'specicationaf This invention relates to thermo cut outs, p for electric conductors. 'It has for its object an im device used in connection w VIn the drawi s z-Fi jj'nal section showing th foutof small'ca aclt 2'0 vention applie wit Fig .`3, shows the inv A out oflarger ca aoity nal section of t e sa 3 but taken at ri shown in Fig. 3. Fig. 5 is A -tion of a modified form from t latshowr'i'iri 1 and 2.

Thermal cutouts (stan the National Board of' Fire Undorwriters)of. p to sixty (60) am eres, comprise. what are nown as spring c ip' cut outs, iii which the ends of thc case are capped with conducting material, and the fuse wire which runs through the case is placed in electric' Larger cut outs or ity than sixty (60) projecting blades or Hon'roi# tates, residing at Def.

' de co wi th th ne roved indicating w 1th such cut outs gure 1, is a longitudif. e construction of ajcut Fig. 2, shWS.; the 1.115;l `a single au'xiliary'- wireff ention applied to a. out. th Fig. 4, Isa lon itudig. t

. im dardized in 1905 by cut outs of greater oapao 'amperes, are made with terminalsof heavy blocks of copper, which are adapted to engage between what are known as knife clips.

The invention intended to be applied to either form, and it consists in an auxilia wire which forins )art ofV the conductor through the case of t le cut-out, but which is ric carrying ca acity.

This auxiliary wire projects through t e case and holdsin confinement a. plate underneath which there is a npring in a tate of tension; -lthat end of the wire which projects through $0'. the confining wall and holds the' late is ea ahle of movement when it is itsclli not hel .to prevent such movement, and upon breaking the auxiliar wire, or otherwise releasin it 30 from its hol ing means,- the plate held by it is b .and serves a's an indi-l.

specatlm o! Letters Patent. Application mea Api 1 1 a'o, 1905. sum no. 314,413

occurs'only high asses! end,

plate confine; s disruplt through which plate there is. tends into jected.-

be'nds slig cap 12, and the .auxiliar nearly ce sing againstthe tenslo any possible outl may be made m terminals project etween the cut out andi the IGNOR T0 HORTON Patented .J' 1 4; 1 1108i".v

Aholding-1vire hasbeen oken. The breakipg Qf theholding :wire after. themain fuse.Wire -has,been lstr ,oyed ,andtheA plate and spring-.thus me an in dicatorto show the condition of e lsewire. u I I f. Referringto-Figl. l, indicates tho \'7a1sj ith'e'gcasc AIn'ado':,.of some -non-condnctiig d.. 3 indicate.; the.; metal caps a vengag e UnderneatheSceping. -.witl 1in it iste; I trical:conneetionfwitli lso ing-...electrical coni fzend" of." "6J tudinallytlirough-the ease ectriclcomle tronwithgthc cap 3. i he and,t e -cap`; 2, -'is a.chan1 chamberia locaed. a

af g.^ jvain sta s ringtlO t at is iled underneatliit 4betweeiii the late and 'eicap 5.. 7is normal-ly eldclose ainst the spring,A I0 by'augiliary wires. 1 1, at i...are in .electrical lgxgnnectionwith- -the .3,1 adare-also electric-'- Bibe-fbut-pass .through :these holes beinglar o ough .allow g. the :wire A: .to move ...free y as' to 'practically ionfp'f the fuse-n..

hin ther-'cascupon 85 The cap' 2is Aprovided with s. n

th plate 7 maybe inspected, d its condition noted. Preferably, on the y 4 a small' boss or knob that ex- .hole 13,-when the plate is pro-- c tion The plate eep hole' '13,

the

ln the form shown in Fig. 2, the main fuse secured toa holding terminal that htly to one sido of the center of the y wire 21 passes ntrally through the'case and only a le wire is employed to hold the plate 17 n of the included spring 20. s foundl between the cap 1 9 d the cap 22, but inasmuch as the plate- 17 largel in this instance, and entirely covers et for fire, the peephole 25'. lch larger than in the form re 16 is Aehamber 18 i own-1n Fig.- 1.

In the larger cut-ou and 32 are heavfyr ts where the terminals bIocks of metal, 4these ou'ghthe caps`29 and as the connectm means' clips.

, 'and areutilized he teripse Wire 36 'which 1410 is generalljyrinl this large size, la ilat strip or stripsof metal with a weakeningw some character intermediate' its ends, so that its po'int of rupture will be certainly located which'isjdraivn through the caseand isj somewhere near the middle of the case. The indlcator in this character of cut-out is a plate 37, entirely external to the cut-out This late 3? not included inl a chamber. holds under compression a-projecti e spring 38, and is' itself held by averyinewire 33,

soldored'to the ca'p 30 at the point 34. The

wire 33 is a part of the interiorfcon'ductor of` the fuse, b ut its carrying capacity is very slight and ninnediately u ionftfie ru )ture of Vthe fuse wire'33 is itsef .overloa ed and broken.'`

IllI Fia" 5, is showna modified vform in aro Secured to thc`cnp 4G by solder-Q l which sldfig'in tubularchamber .41; the 4rethe fuse wire project-ing through hole 49,the holdingwirc 4S engages through ,thesamehole, then both" fuso wire" and holdingwire 'hatI claiin is'r-A- l v -v 1. In athen-uio electric cul-out, in combination with. an inelosing ease, a. plurality of fuse. `wires of', unequal siz/.e extern ing lengthwise thereof, neither of said wires aleie being 'capable of carrying the full. strength of current intended to be passed therethrough, and

a resilient indicator normally held lby one ol' said fuse, wires in retracted.position with re- .spect to the case, adapted, upo". the breaking of its restraining fuse wire, to assume an abnori-nnl )osit-ion with respect 'to the case, substantial y as described.

2. In a thermo elcctriiA cut out, in combination with a case, a iiovahlc indicator, means for actuating the indicator, aspair of electric conductors of different cu rre-nt-carryp 'carried through the diaphragm 42, wlnchs'eiyes as an abutment for actuating spring 43 tlieiice itis carried throughfithe l case andrught out through the saineV erh foration with thefuseivi're 44; infiis's'enib ing'.

ing capacity, having a united-capacity suit- 'ab combination with a case, metallic end pieces therefor, a main fuse wire extending through said ease fromone end piece to the other, an auxiliary-wire extendi 0' loosely through one vof said' end ieces and xed to the other end piece, an in catorcarried bythe projecting end oi said wire close to the exterior ofA the cap, yanda spring engaging between 'the indi'- cato and the cap whereby upon the breaking of the auxiliarywire itis proJec-tedaway from the ca- ',substantially as described. j

.'4. ii, thermo 'electricjcut out, haviftg, in combination iyitlia casing, a main' conductor extending therethrough,- an .auxiliary wire :..so extending therethrough, saiduire being in 'electricalconnectidnu'it-lrtlie ,nductor and fixed toene. end of .the casini'iirithits other end: ,projecting-@ loosely; throuvh the other end thereof, anindicator'carriedbon the projectiiire'nd of -said wire, and,y a spring1 .against w ioseresiliency said indicator is he -by said auxiliaryr wire againstfth'e end of the casing, adapted upon the breaking of said .auxiliary wire to projectsaid indicator away from Vthe end Yol the ei'ising,l substantially as described.' l i .SQAv thermo electric.eut-out,'having in combination a case,` metallic end closure pieces therefor, a pair of fuse wires'extending.

through said casing, said'wires being of unequal size, and thesinaller beingixed at one end to' the inctallii` closure and extending through t-,heiother end closure, and a resilient indicator normally held by said -sinaller fuse wire in retracted positionvi'ith res cet to the end closure, ada ted to be release( fi'om such positimi u on tie disruption of said wire,

substantia ly as describe( In testimony whereof, I sign'this specificavt. io n in the presence o f two witnesses.

` A .BRYSON D. NORTON.

Vitnesses:

CHARLES EBURTON, WiLiJAir M. SWAN. 

